The question does V26 help or make it worse. I only use iOS Devices. Since there is no way back I want to be very careful deciding whether to upgrade or not.

The V26 firmware is required to make the latest app version perform correctly.It is suppose to fix the DST issue you have as well as add extra offset times.If it makes things better or worse I guess depends on the end user. In my case it made the app better but I run an Android phone

Scrolling through the history crashes the app on my Google Pixel XL using Android 9 and my Fire tablet running Fire OS 5.6.2.0

Send the crash log to support. From support:

On my android, this is found under "My Files" and then i can do a search for "Crash" and it displays a folder (the actual path though is My Files>MyDevice>Crash). It will create one of these logs each time an app crashes. The ones at the top are the latest ones.